Gas heater



G.. A. HOFFMAN.

GAS HEATER.

APPLICATION HLED AUG.8, I921.

Patented Mar. 28, 1922.

PIE; 2

To all whom it may concern:

Beit knownthat I, GnonenA; I-IorrM N, a. citizen of the 'United States,residing at vMansfield, in the county 'of Richland and State of Ohio,have invented certain new and useful Improvements in Gas-Heaters;

means for the heat radiating members, acts also as part of the meanswhich holds the fire-back in the heater casing.

l/Vith the foregoing in view, the invention.

resides in the novel subject matter hereinafter described and clalmedand shown in I the accompanying drawing.

Figure 1 is a front elevation partly in section, showing a portion ofagas heater constructed in accordance with my invention.

Figure 2 is an end elevation with parts broken away and shown insection.

Figure 3 is a detail vertical sectional view through the upper endportion of the fire back.

Figure 4 is a detail end view of one of the radiants.

In the drawing above briefly referred to, the numeral 1 designates anappropriate casing having the usual end walls, 2. Within the lowerportion of the casing, a suitable burner 3 is mounted'and over thisburner, a horizontal supporting plate 4 extends across the interior ofthe casing, said plate being longitudinally depressed to form a channel5 and being pressed upwardly in advance of said channel to provide alongitudinal rib 6. The portion of the plate 4 between the channel 5 andthe rib 6 is provided with a plurality of openings 7 located above theseveral jets of the burner 8.

The numeral 8 designates an upstanding fire back formed of anyappropriate material, the front side of said fire back being formed witha shallow recess 9 which is approximately co-extensive therewith,comparatively narrow vertical walls 10, howsrai'ra enoaen ALBERTHOFFMAN, or MANSFIELD, onro.

Specification of Letters Z Patent. L Patented Mar, Application filed August s, 1921. Serial no. 490,629.

M tr ck ens HEATER.

' ever, being left at the vertical edges of the fire back while a widerwall 11 extends across the upper edge portion thereof. The

lower edge of the main body portionof the fireback 8 i-sreceivedremovably in the channel 5 and the ends of this channel are preferably"turned forwardly as indicated at5 in- Fig. 2, whereby to receive thelower ends of the walls 10. The upper end. portion of the fire back 8 issecured in place within the casing 1 by novel means yet to be described.

Filling the recess 9 and disposed side by side, are a number of verticalradiants or radiating members which are of hollow formation and formedof such material as to be heated to incandescency by the jets from theburner 3. The lower ends of the radiants 12 rest on the plate 4 betweenthe rib 6 and the body portion of the fire back 8 while the upper endofsaid radiants' are provided with upstanding lugs 13 whlch are receivedin a longitudinal channel .14 with which the lower edge of the wall 11is formed. As shown, the lugs 13 terminate in spaced relation with theupper side of the channel 14 so as to permit upward movement of theradiants 12, this upward movement being 7 necessary in order to free thelower end of any radiantfrom therib 6 when it is to be removed, forinstance to be replaced by a new part. The construction in question alsofacilitates assembly of the device as will be readily understood.

As shown most clearly in Fig. 1, the ends of the channel 14 continuethrough the vertical walls 10 and open at opposite vertical edges of thefire back 8, these channel ends a receiving nuts 15 formedof anyappropriate heat-resisting material. In the practical manufacture of thedevice it is desirable to have the ends of the channel 14 extend to thevertical edges of the fire back and screws 16 are passed throughthe endwalls 2 and threaded into said nuts as indicated most clearly inFigure 1. I i

From the foregoing, taken in connection with the accompanying drawing,it will be seen that I have provided an extremely simple andinexpensive, yet a highly efiicient and desirable arrangement of partsfor mounting the lire back in the casing and for detachably securing theradiants in place. Since excellent results are obtainable from thedetails disclosed, they are by preference followed, but it is to beunderstood that within thescope of the invention as claimed, numerousminor changes may bemade.

' I claim:

1. A gas heater'comprising a casing, a

fire-back in said casing whose front side formed with a recessapproximately co-eX- tensive therewith and adapted to contain verticalheat-radiating members, the upper wall" of said recess having adownwardlyopening longitudinal channel whose ends extend through bothvertical edges of thefire-back, saidchannel being adapted to receive theupper ends of theheat-Lradiating members, nuts contacting with the innerside of the casing'at the endslof said channel, and screws passinginwardly through the casing and threaded into. saidnuts, saidscrews-bein 7 within the ends of said channel to re-= tain the fire=backin the casing.

2. A gas heater comprising axcasing, afire-back in said easing whosefront side is formed with a recess approximately co-extensive therewithand adapted to contain vertical heat-radiating members, the upper wallof said recess having a downwardly opening longitudinal channel whoseends extend through ,both vertical edges of thefire-back,

said channel being adapted to reeeivethe upper ends, of theheat-radiating members, heat-resisting casing-protecting plugs fillingIn testimony whereof]: have hereunto set:

my hand., 1 V V GEORGE ALBERT HOFFMAN. t

